Watchman s time-detecter



(No Model.) 2 Sheets-Sheet 1.

H. J. WENZEL.

WATOHMANYS TIME DETEGTBR.

No. 253,963. Patented Feb. 21.1882.

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WATOHMANS- TIME DETEOTER. No. 253,963. Patented Feb. 21,1882.

. I WITNEEEEE' Q w Av 2 W4 11 J INVENTEIR a b 7 QM 15x K UNITED STATES PATENT OFFICE.

HERMANN J. W'ENZEL, OF SAN FRANCISCO, CALIFORNIA.

WATC H MANS TIM E- DETECTER.

SPECIFICATION forming part of Letters Patent No. 253,963, dated February 21, 1882.

Application filed September 20, 1881. (No model.)

To all whom it may concern:

Be it known that I, HERMANN J. WENZEL, a citizen of the United States, and residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Watchmens Time-Detectors, of which the following is a specification.

My invention relates to improvements in watchmens time-detectors in which the recording mechanism is connected to the ordinary runninggear of a clock; and the object of my improvement is to so connect with the ordinary mechanism of a clock a marking or registering device that the time of day or night at which the mark is made will be indicated on a slate or dial that cannot be tampered with by the watchman on duty. 1 attain these objects by the mechanism illustrated in the accompanying drawings, in which-- Figure 1 is a general plan of my improved device as it would appear upon the removal of the dial and casing of the clock. Fig. 2 is a planof the recording mechanism, the re cording dial or slate being removed. Fig. 3 is an edge view of the lever C. Fig. at is a side view of therecordingor registering mechanism.

Similar letters are used to designate like parts throughout the several views.

A represents the ordinary post or arbor carrying the minute-hand of the clock, and having keyed upon it the double canrwheel B, which operates upon the inner end of the lever C. The lever C is pivoted to the clock-frame, and to it is attached, atits outer end, the rod or wire D, which connects with the bell-crank lever E, loosely journaled upon the post or stud F. The stud F also carries the ratchet-wheel G, and to its face is connected the pinion H, which meshes with the spur-wheel I, suitably placed upon the post J, upon which it revolves.

To the upper arm of the bell-crank lever E is pivoted the pawl K, which engages with the teeth of the ratchet-wheel Gr, and produces a revolution of the same, while the pawl L, which is journaled upon the stud M and held in place by the bent spring N, prevents any reverse motion of the said ratchet-wheel Gr. Upon the outer face of this ratchet-wheelG, I secure the short drum or wooden block 0, which serves as a bearing against which the recording disk or slate 1? may be clamped by means of the spring clamping-plate Q and milled nut B, so that the latter can be screwed down upon the stud J, upon the outer end of which a screwthread is cut for that purpose. By this construction it will be seen that the spur-wheel and recording-disk will revolve together, and both turn freely upon their supporting stud or spindle.

At one side of the marking or recording disk or slate P, 1 set the stud S,to which is pivoted the marking-lever T. This marking-lever is held in its proper position by the coiled spring U. In the upper end or arm, T, of this lever I place a short sleeve, V, in which is set the recordingpencil, and in order to keep the point of said pencil in continual contact with the disk or slate l secure to the outer face of said lever-arm the flat spring W, which presses upon the outer end of the pencil and keeps it in contact with the disk, as is clearly shown in Fig. 4. The lower arm, T, of the marking lever is pierced with a series of holes, vertically arranged, and through which pass the operating wires or rods X, the inner ends of which are provided with a cap or head, a, which prevents the rods from being withdrawn from the leverarm, and they are held in position and guided by the guide piece or plate I), through which they freely pass. Upon the wires or rods X, and between said lever-arm and guide-bar b, I firmly attach at progressive distances from the lever-arm T collars or lugs c, which limit the distance or space over which the lever-arm is to travel, and thereby regulate the length of the mark made upon the disk 1?.

It should here be observed that by this construction any number of cams upon the arbor of the minute-hand may be employed to pro duce a rotating movement of the recordingdisk, one cam being sufficient to produce a movement of the recording-disk once in each hour, two cams for a movement every'halfhour, and so on. I

The operation of my improved device will be as follows, to wit: The device being set in motion, each revolution or semi-revolution of the cam 011 the arbor of the minute-hand will, by means of the connecting-levers, ratchetwheel, and gearing, cause the disk or slate to be partially rotated upon its spindle, when by pulling upon one of the wires X, which project any desired distance beyond the casing of the machine, the pencil-point upon the upper end of the lever-arm will be caused to make a mark or line upon the slate opposite a subdivision,

which will indicate at what hour the marking 5 took place.

By having the wires X placed at different distances from the fulcrum of the markinglever the length of the stroke or mark will be regulated, and if the wires are led to different parts of the building in which the watchman is employed the length of the mark on the recording=disk will indicate his presence at the various posts or stories of the building at stated intervals.

The face of the recording-disk is provided with an indicating-scale so divided as to correspond with the number of days in a week, which divisions are subdivided, so as to indicate the fractional parts of a day or hour.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

In a watchmans time-detecter the combination, with a clock-movement having arbor A, provided with cams B, of the levers G and E, 2 5 connected by rod D,ratchet Gr, having pinion H, pawls K L, adapted to engage with said ratchet, spur-wheel I, meshing with said pinion, and provided with bearing 0, rotating disk P, clamped to bearing 0, and registering-lever T, 0 provided with suitable mechanism for holding a pencilin contact with the rotating disk, substantially as shown and described.

In testimony that I claim the foregoing l have hereunto set my hand and seal this 3d day of September, 1881.

HERMANN J. WENZEL.

Witnesses:

O. W. M. SMITH, Guns. E. KELLY. 

